Safe explosion-proof device for ash removal system of positive-pressure biomass gasifier

Abstract

The utility model relates to a safe explosion-proof device for an ash removal system of a positive-pressure biomass gasifier, which comprises a cooling cylinder, a cooling pipe arranged in the cooling cylinder, a cooling water inlet assembly externally connected with the cooling pipe, a cooling water return assembly externally connected with the output end of the cooling pipe, and an ash inlet and a nitrogen inlet arranged at the input end of the cooling cylinder, the output end of the cooling cylinder is provided with an ash discharge port and a nitrogen output port. According to the safe explosion-proof device for the ash removal system of the positive-pressure biomass gasifier, disclosed by the utility model, the safe explosion-proof device is arranged between the ash discharge port of the dust remover and the ash bin, so that a fly ash cooling function can be realized, combustible gas can be prevented from entering ash cooling equipment through nitrogen, and air in the ash cooling equipment can be exhausted by utilizing the nitrogen when necessary, so that the safety of the ash removal system of the positive-pressure biomass gasifier is ensured. Flammable gas deflagration and fly ash spontaneous combustion are prevented, and spontaneous combustion fly ash can be extinguished.

Description

Technical Field

[0001] The utility model relates to the technical field of biomass gasification safety transportation, and more specifically, to a safety explosion-proof device for a ash removal system of a positive-pressure biomass gasification furnace. Background Art

[0002] At present, most of the biomass gasification processes in China use negative pressure biomass gasifiers. Compared with positive pressure biomass gasifiers, negative pressure biomass gasifiers have slightly lower gasification efficiency but higher safety. Although positive pressure biomass gasifiers have higher gasification efficiency, they have the risk of combustible gas leakage and explosion, which has become the main factor restricting their industrial promotion.

[0003] The fly ash in the combustible gas generated by the positive pressure biomass gasification furnace is collected by the dust collector, cooled by the ash cooling equipment and transported to the ash bin for storage.

[0004] At present, the most commonly used ash cooling equipment is the drum ash cooler, which has only cooling and conveying functions. However, the fly ash contains a certain proportion of carbonized biomass particles, plus mixed combustible gases, which come into contact with air in the drum ash cooler, posing a risk of deflagration, and a new safety explosion-proof device is needed. Utility Model Content

[0005] The utility model provides a safety explosion-proof device for an ash removal system of a positive pressure biomass gasification furnace, so as to solve the technical problem that the existing roller ash cooler has a low safety factor and may cause explosion during cold ash transportation.

[0006] According to one aspect of the utility model, a safety explosion-proof device for a positive-pressure biomass gasification furnace ash removal system is provided, comprising a cooling cylinder, a cooling pipe is internally disposed in the cooling cylinder, the cooling pipe is externally connected to a cooling water inlet assembly, the output end of the cooling pipe is externally connected to a cooling water return assembly, an ash inlet port and a nitrogen inlet port are provided at the input end of the cooling cylinder, and an ash discharge port and a nitrogen outlet port are provided at the output end of the cooling cylinder.

[0007] Preferably, based on the above solution, a roller is provided at the bottom of the cooling cylinder, and a driving wheel is provided in the middle of the cooling cylinder, and the driving wheel is connected to the motor through a transmission body.

[0008] Preferably, based on the above solution, the cooling cylinder is arranged in an inclined manner.

[0009] Preferably, based on the above solution, the cooling tube is designed to be U-shaped, and the input end of the cooling tube and the output end of the cooling tube are both located on the same side of the cooling tube.

[0010] Preferably, based on the above solution, the nitrogen inlet and the nitrogen outlet are both connected to the cooling cylinder via a pneumatic ball valve.

[0011] Preferably, based on the above solution, a manual ball valve is provided between the cooling water return assembly and the cooling cylinder.

[0012] Preferably, based on the above solution, an electric regulating valve is provided between the cooling water inlet assembly and the cooling cylinder.

[0013] Preferably, based on the above solution, the ash inlet is connected to the ash inlet pipe through an electric air lock and a level meter.

[0014] The utility model discloses a safety explosion-proof device for an ash removal system of a positive pressure biomass gasifier. By being installed between the ash discharge port of a dust collector and an ash bin, in addition to realizing the fly ash cooling function, the device can also prevent combustible gas from entering the ash cooling equipment through nitrogen. When necessary, the nitrogen is used to exhaust the air inside the ash cooling equipment to prevent the combustible gas from deflagration and the fly ash from spontaneous combustion, and the fly ash that has spontaneously combusted can be extinguished. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following is a brief introduction to the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0016] Figure 1 This is a schematic diagram of the safety explosion-proof device of the positive pressure biomass gasification furnace ash removal system of the utility model;

[0017] Figure 2 This is a schematic diagram of the cooling cylinder of the utility model;

[0018] Figure 3 This is a physical picture of the safety explosion-proof device of the positive pressure biomass gasification furnace ash removal system of the utility model;

[0019] Description of Figure Numbers:

[0020] 1. Ash inlet assembly; 11. Ash inlet pipe; 12. Electric air lock; 13. Material level meter; 2. Cooling cylinder; 21. Combustible gas detector; 22. Temperature transmitter; 23. Cooling pipe; 24. Ash inlet; 25. Nitrogen inlet; 26. Ash outlet; 27. Nitrogen outlet; 28. Input end of cooling pipe; 29 Output end of cooling pipe; 3. Cooling water inlet assembly; 31. Cooling water inlet pipe; 32. Electric regulating valve; 4. Cooling water return assembly; 41. Cooling water return pipe; 42. Manual ball valve; 5. Nitrogen inlet assembly; 51. Nitrogen inlet pipe; 52. Pneumatic ball valve; 6. Nitrogen exhaust assembly; 61. Nitrogen exhaust pipe; 62. Pneumatic ball valve; 7. Motor; 71. Roller; 72. Drive wheel. DETAILED DESCRIPTION

[0021] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0022] It should be understood that when used in this specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or collections.

[0023] In order to simplify the drawings, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0024] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0025] In the embodiments shown in the drawings, the directions (such as up, down, left, right, front and back) used to explain the structure and movement of the various components of the present invention are not absolute but relative. These descriptions are appropriate when the components are in the positions shown in the drawings. If the description of the positions of the components changes, the directions also change accordingly.

[0026] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0027] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0028] See also Figure 1 , and combined with Figure 2 and Figure 3As shown, the utility model is a safety explosion-proof device for the ash removal system of a positive pressure biomass gasification furnace, comprising a cooling cylinder 2, a cooling pipe 23 built in the cooling cylinder 2, the cooling pipe 23 is externally connected to a cooling water inlet assembly 3, the output end of the cooling pipe 23 is externally connected to a cooling water return assembly 4, the input end 28 of the cooling cylinder 2 is provided with an ash inlet 24 and a nitrogen inlet 25, and the output end 29 of the cooling cylinder is provided with an ash discharge port 26 and a nitrogen output port 27.

[0029] A roller 71 is provided at the bottom of the cooling cylinder 2 , and a driving wheel 72 is provided in the middle of the cooling cylinder 2 . The driving wheel 72 is connected to the motor 7 through a transmission body.

[0030] When in use, the fly ash collected by the dust collector is introduced into the external ash inlet assembly 1 through the ash inlet 24, and the cooling pipe 23 is started at the same time, and cooling water is poured into the cooling pipe 23. The fly ash is quickly cooled by the cooling water in the cooling pipe 23. At the same time, the nitrogen is filled in the cooling cylinder 2, and the combustible gas in the cooling cylinder 2 can be discharged to avoid spontaneous combustion during the transportation process, ensuring the safety of transportation. At the same time, the motor 7 drives the driving wheel 72 to rotate, so as to realize the rapid rotation of the cooling cylinder 2 and make it cool more evenly. Preferably, the cooling cylinder 2 is arranged in an inclined manner.

[0031] In order to further reduce the space occupancy rate, the present application designs the cooling pipe 23 to be U-shaped, and the input end of the cooling pipe 23 and the output end of the cooling pipe 23 are both located on the same side of the cooling tube 2 .

[0032] In order to realize automatic control of its delivery, the nitrogen inlet 25 and the nitrogen outlet 27 of the present application are connected to the cooling cylinder 2 through pneumatic ball valves.

[0033] The nitrogen intake assembly 5 comprises a nitrogen intake pipe 51 , one end of which is connected to the nitrogen inlet of the drum ash cooler 1 , and the other end is connected to the nitrogen main pipe. A pneumatic ball valve 52 is installed in series in the middle of the nitrogen intake pipe 51 .

[0034] In this embodiment, combined with Figure 1 As shown, the nitrogen exhaust assembly 6 includes a nitrogen exhaust pipe 61 , one end of the nitrogen exhaust pipe 61 is connected to the nitrogen outlet of the drum ash cooler 1 , and the other end is connected to the drum ash cooler 1 , and a pneumatic ball valve 62 is installed in series in the middle of the nitrogen exhaust pipe 61 .

[0035] Please continue reading Figure 1 As shown, a manual ball valve is provided between the cooling water return assembly 4 and the cooling cylinder 2 of the utility model, and an electric regulating valve 32 is provided between the cooling water inlet assembly 33 and the cooling cylinder 2.

[0036] Specifically, the cooling water inlet assembly 33 includes a cooling water inlet pipe 31, one end of the cooling water inlet pipe 31 is connected to the cooling water inlet of the drum ash cooler 1, and the other end is connected to the cooling water inlet main pipe. The electric regulating valve 32 is installed in series in the middle of the cooling water inlet pipe 31.

[0037] In this embodiment, combined with Figure 1 As shown, the cooling water return assembly 4 includes a cooling water return pipe 41, one end of the cooling water return pipe 41 is connected to the cooling water outlet of the drum ash cooler 1, and the other end is connected to the cooling water return main pipe. A manual ball valve 42 is installed in series in the middle of the cooling water return pipe 41.

[0038] In order to realize automatic feeding, the ash feeding assembly 1 of the utility model comprises an ash feeding pipe 11 , and the ash feeding port 24 is connected to the ash feeding pipe 11 through an electric air lock 12 and a material level meter 13 .

[0039] The utility model discloses a positive pressure biomass gasification furnace ash removal system safety explosion-proof device, which is installed between the dust collector ash discharge port 26 and the ash bin. In addition to realizing the fly ash cooling function, it can also prevent the combustible gas from entering the ash cooling equipment through nitrogen. When necessary, the nitrogen is used to exhaust the air inside the ash cooling equipment to prevent the combustible gas from deflagration and the fly ash from self-igniting, and the fly ash that has been self-ignited can be extinguished.

[0040] During the specific implementation, firstly, the parameters of the ash inlet pipe 11, electric air lock 12, level meter 13, drum ash cooler, combustible gas detector 21, temperature transmitter 22, cooling water pipe, nitrogen pipe and related valves are calculated and determined according to the ash discharge volume of the dust collector, fly ash temperature and carbon content.

[0041] Secondly, the electric air lock 12, the material level meter 13, the drum ash cooler, the combustible gas detector 21, the temperature transmitter 22, the relevant pipelines and valves are connected and installed as a whole. Thirdly, the whole system is subjected to a water pressure test and a tightness test, and the material level meter 13, the combustible gas detector 21, the temperature transmitter 22 and the electric air lock 12, the electric regulating valve 32 and the pneumatic ball valve are debugged and tested for linkage. Finally, the whole system is subjected to anti-corrosion and heat preservation treatment.

[0042] During normal operation, the electric regulating valve 32 and the manual ball valve are opened, the pneumatic ball valve is closed, the cooling water operates normally and the level meter 13 does not feedback a low level signal, the electric air lock 12 and the drum ash cooler are put into operation, and the high-temperature fly ash enters the drum ash cooler, is cooled to below 100°C and discharged into the ash bin for storage.

[0043] If the fly ash level in the ash inlet pipe 11 is lower than the level meter 13, the level meter 13 will feedback a low level signal, the electric air lock 12 will stop operating immediately, the drum ash cooler will continue to operate for a period of time and then stop operating, and the electric regulating valve 32 will be closed.

[0044] If the temperature of the fly ash after cooling exceeds 120°C, the temperature transmitter 22 transmits a signal to the electric control valve 32 to adjust its opening to the maximum, so that the cooling water volume is maximized. When the fly ash temperature drops below 90°C, the temperature transmitter 22 transmits a signal to the electric control valve 32 to adjust its opening to a normal value. If the temperature of the fly ash still rises and exceeds 150°C after the opening of the electric control valve 32 is adjusted to the maximum, or the combustible gas detector 21 detects the presence of combustible gas in the machine body, the signal is fed back to the electric air lock 12 to stop operation, and the pneumatic ball valves of the nitrogen intake assembly and the nitrogen exhaust assembly are opened at the same time, and high-pressure nitrogen enters the drum cooler, exhausting the air therein to the dust collector inlet flue to prevent the combustible gas from deflagration, the fly ash from spontaneous combustion, or extinguishing the fly ash that has spontaneously combusted. The opening time of the pneumatic ball valve is determined according to the operation needs, and it automatically closes after the time is up.

[0045] The utility model can utilize fly ash to form a material column for sealing, thereby preventing combustible gas from entering the ash cooling equipment; measures can be taken in stages according to the temperature, thereby effectively controlling the ash discharge temperature while saving cooling water; it can prevent the combustible gas from deflagration, and can also prevent the fly ash from spontaneous combustion and extinguish the fly ash that has spontaneously combusted; it has automatic temperature control and temperature adjustment functions, does not require manual operation, and has a high degree of automation; it does not damage the structure of the drum ash cooler, and does not affect the safety and operation of the system; it can be integrated on the machine body during the manufacturing process of the drum ash cooler, and can also be used to modify the drum ash cooler that has been put into operation, and has good applicability.

[0046] Finally, the method of this application is only a preferred implementation scheme and is not intended to limit the protection scope of the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A safety explosion-proof device for a positive pressure biomass gasification furnace ash removal system, characterized in that: It comprises a cooling cylinder, wherein the cooling cylinder has a cooling pipe built in, the cooling pipe is externally connected to a cooling water inlet assembly, the output end of the cooling pipe is externally connected to a cooling water return assembly, the input end of the cooling cylinder is provided with an ash inlet and a nitrogen inlet, the output end of the cooling cylinder is provided with an ash discharge port and a nitrogen outlet; the nitrogen inlet and the nitrogen outlet are both connected to the cooling cylinder through a pneumatic ball valve; a manual ball valve is provided between the cooling water return assembly and the cooling cylinder; an electric regulating valve is provided between the cooling water inlet assembly and the cooling cylinder; the ash inlet is connected to the ash inlet pipe through an electric air lock and a material level meter; and a temperature transmitter is provided on the cooling cylinder.

2. A safety explosion-proof device for a positive pressure biomass gasification furnace ash removal system as claimed in claim 1, characterized in that: A roller is arranged at the bottom of the cooling cylinder, and a driving wheel is arranged in the middle of the cooling cylinder. The driving wheel is connected to the motor through a transmission body.

3. A safety explosion-proof device for a positive pressure biomass gasification furnace ash removal system as claimed in claim 2, characterized in that: The cooling cylinder is arranged in an inclined manner.

4. A safety explosion-proof device for a positive pressure biomass gasification furnace ash removal system as claimed in claim 1, characterized in that: The cooling pipe is U-shaped, and the input end of the cooling pipe and the output end of the cooling pipe are both located on the same side of the cooling cylinder.

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